Printing machine



Aug. 28, 1923. V 1,466,526

' E. GROSSE PRINTING MACHINE Original Filed May 5. 1921 Jzregffgg; @Mw

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:Patented Aug. 28, 1923.

EDUAR-LD eaossnjor .wnonwrrz NEAR zonnsnnn, e narinnyf p PRINTINGMACHINE.

"Original application filed May 5, 1921, Serial No. 467,187. Divided'andthis application filed June 9, 1 I I, 1922. Serial-No. 567,233. '1 1' m.

To all whom it may}, concern: r 3 transfer cylinder in ,the upperposition.

V Beit known that I, E UARD Gnossn, a citi The form 13 is arrangedabovethe path of zen of Germany, and residing at Wachwitz the platen andtheelastic flat 'form 14; is near Dresden,- .Grundstrasse 8, Germany,arranged onthe printing level of the platen have inventedjcertain new,and useful Im- 11 so that'the later will be pressed against provementsin Printing lllachines of-which it when itfis brought intoprintingposition. the followingis aspecitication- V "Theform 13 is inkedbymjeans of the to-' This invention isa divisional application and-fromoving, inking rollers 5 which in from the parent application Sen 67,l87turn are being moved by'thelever arrange- .IQ filed May5th 1921. v 7'nien't 60,v 61, 62. The transfer of the'print-"G The present invention,relates to a platen ing picture from theform 13*tothe elastic presswhich is simultaneously adapted to flat form 14 isefl'ected by means'ofthe direct as well as indirect printing. Indirect transfer cylinder 6which, through thelever or off-set printing was heretofore knownarrangement 63, 64,765-is moved-to-and-fro 15 only in connection withlithographic rotary over both forms. The transfer cylinder 6 '65 andrapid printing machines. 'The present and the flat form let are coveredwith elasinvention applies'this method of printing to tie material,preferablyrubber. Theannuplaten presses used in printing establishlarcircumference of the transfer cylinder as ments for printing fromcomposed type and an incisionj66, which. during the to-and-fro cuts, andthis application naturally required movement of'the' transfer cylinder.over the fundamental changes in the known type of ink rollers 67 is insuch a position to-covor platen presses. the ink roller In thismannerthe trans Printing with the aid ofthe known type, fer cylinder 6' caneasilyroll over the ink of platen presses was accomplished bypressroller 67 without touching it. Y 1

ing the workpiece by means of the hard sur- In the position forlaying-on the sheets face of the platen directly onto hard surfacewherein the press is'shown in the drawing. of the form which usuallyconsisted of metal. the transfer cylinder 6 is shown at the lower Thisrequired a very highpressure necessiend of the flat form 14,the'inkingrollers 5" tatingthe use of very strongly constructed lie onthe ink roller 67 and receive inkfrom 30 machines; H the latter: Assoonas the platen 11 begins According to the present invention if the to getinto printing position, the rollerspass indirect method of. printing isbeing femover the forms 1 and l3'into the position ployed', pressureis'no longer directly exerted shown in dotted lines 6, 5 2- Theinkingupon the hard form, but from theilatter, by rollers 5 are then in theposition indicated 5 means of an elastic, preferably rubber-covby 5 uponthe ink rollers 3370f. the, inking ered roller v atransfer is takingplace to an arrangement and are now supplied there elastic flat formagainst which the platen with ink. with the workpiece is being pressedwhereby V In the meantime the platen has gone into 7 the transferredpicture or composition is printing position by'pressing itself against40 again being transferred from the. elastic the elastic, flat form llz. If the platen has flat form to the workpiece or working sheet.finished its printing aotion,the transfer cyl By inserting this elasticflat formthe inder Gpasses fromthe position 6 overthe amount ofpressureneededv is considerably form l3 and takes oil" from the latter;in reduced and even in the productionof very form of an impression, theink previously .7

4 large sheets only a slight pressure is-iieeded, supplied by the inkingrollers; ,bridges with 'lhe attached; drawings indicate one emitsincision 66 the inkroller 67 enters then bodiment of the invention,Figural ;repre upon the elastic form' 14 andtransmits its senting asectional view of theplaten press, impression to the latter-, untilit'ar-rives, at Figure 2 shows the transfer cylinder inthe the lowerposition 6 where it reverses its O lower position; while Figure 3 showsthe movement in the opposite direction, c-

they remain for a short time, rotate through friction with the inkroller 67 and are supplied with ink by the latter. With this freshsupply of ink theytink again the form.

13 on their return trip to the inking arrangement 33, 34. Thec1rcu1nference of the inking rollers is large enough to permit ust onerotation during 1ts passage over ing rollers-5 remain stationary forapshort time over the ink rollers 33 and 67 and the to-and -fro movementof the lever arrange the form 13 whereby uniform inking without theformation of any stripes "s assured. For'the purposerof receiving inkfilllll'llQ ment 60,61, '62 is arrested for the same period when thecranks are reversed. This is effected by means of the spur wheel 8 whichis equipped with 'teethon parts of its circumference and whose toothlessparts always cause during rotation a shortstop of the cog wheel 68driven by it, Spur wheel 8 together with spur wheel 38 is mounted onthemain shaft 9 to both ends of which are also attached the cranks 10which by means of the connecting rods 10 effect the 'movement of theplaten 11. The two spur wheels 8 and 38 rotate therefore in the samemanner as the cranks 10 of the connecting rods. Spur wheel 8 engageswith the crank wheel 68 whose cranks 69- operate the rod with lever arm6i and the guide rod 62 with'the linked-on carrier 70 of the inkingrollers 5. j i

As the spur wheel 8 has two toothless spots arranged opposite eachother, it drives the crank wheel 68 at the toothedparts only while thecrank wheel 68 remains stationary during the passage of the toothlessspots in' order to cause-the lever arrangement 60,61, 62 and thelinked-on carrier 70 of theink ing rollers 5-to occupy always in themoment of'stopping the position on the ink rollers 7 33 or the inkroller 67.

7 transfer cylinder 6 mustcarry out one of" The spur wheelf38 engageswith the equal- 1y large crank wheel 71 and actuates by means of thecrank 7 9 the lever arrangement 63,64, and the linked-on carrier of theroller 6 in such a m'annerthat*theroller 6 at each turn of the wheel'isled onceto-andfro over the forms 13"and14c. i

As a repeated transfer isnot'desirablethe its two movements, i. e.either the'forward or the backward movement, without touch ing the forms13 and 14. The constructive;

example shown here exhibits the transfer cylinder in raised positionduring its movement from the lower position 6 to the upper position 6.As lifting device serves f; 1. a

wedge 72 (Figs. 2-3) arranged under the elastic sliding bearing 72 ofthe transfer cylinder 6; this wedge can slide to'the, right :or leftand-cause therebya raising or lowering of the transfer cylinder 6. Ifthe wedge '72 is moved to; theright; (Fig. 2) the sliding bearing 72will be raised by sliding on the inclined plane of the wedge 72 and thetransfer cylinder. 6 will maintain a certain distance .fromthe forms 13and:14:.

If, onthe other hand, the wedge is pushed to the left as indicated in 3,the sliding bearing will be lowered and the transfer cyl-. inder6ftouches on; its return trip the forms 13" and'l l. Themoving of tllwedge 72' is effected by means of adjustable steps 73,

'Ztprovided at both ends ofthe; roller path;

these stops are touched by extensionson the right and left end of thewedge 72. 1fhe lifting device can also consistiof any other suit-ablemechanism. I j

Having now described the nature of, my invention and how the same may beper formed, what I claim and desire to secure through Letters Patent isp 7 1. In improvementsof platen presses the combination of a. platen, aform arranged above the path of the platen, an elastic flat formsituated on theprinting level of the platen and to-andfro movinginkingrollers;

' so I means of moving themover the. form, and V a transfer cylinder,also means of moving this transfer cylinder over the elastic flat formand the form and an inking arrangement, exactly as described. Y I

2. In improvements of platen pressesthe combination of a platen, a formarranged above the path ofmovement of the platen,

an elastic fiat form situated on the printing level of the platen,to-and-fro moving ink} ing rollers, a system of levers adapted to move.the inking rollers over the form, and a transfer cylinder f and leversadapted. to move the transfer cylinder, over theform and the elasticflat form the transfer cylinder transmittingfthe printing picture? fromthe form to the elastic flat form, alsomeans of causing the platen tomake alternate movements corresponding to the upward, and

downward movement of the inking rollers and the transfer cylinder insuch a manner that the P g ct n; ake p ace after the passage of thetransfer'?cylinclerover the elastic form and during the inking oi the asdescribedi :1

i 3. In improvementsofplaten presses 'ithef form by" means of theijnking rollers, eggactly V mb n ion a platens a erm; elastic V fiat fm; nking r ler and a transfer. sylier p ifiiers n sl i' eabearie a nemham m adapte te ift the. tr nsfer cylinder'olff the form and the elasticfiat form during one to-and-fro movement i so In testimony whereof Iaflix my signature that durlng one forwardrmovement the trans- 1npresence of two Witnesses. fer cyhnder remems out of touch W1th the flatelastic form and. the printing form While EDUARD G E' 5 during itsreturn trip the contact is re-. Witnesses:

established, or vice versa, exactly as de '0. LANDESKROENER',

scribed. WAPPLER. I

